Torch



March 13, 1928.

J. J. SALM TORCH Filed. Dec. 51. 1926 INVENTOR. 70/20 Z SALM A TTokNEYs.

Patented Mar. 13, 1928. v u NITED STATES "PATENT OFFICE.

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Application fled December 31, 1928. Serial No. 158,213.

This invention relates to torches capable of using gaseous fuel 'such asnatural gas, by-productgases, etc.,to provide a carbon1z ing flameuseful in removing sca'le,-rust or 6 corrosion from metal surfaces, suchas rubber vulcanizing molds, etc., and also for use in brazing, burningand other metal Working operations. i

The general purpose of the invention is to provide an improved torchcapable of providing an effective heating flame.

Particularly the invention has for its object the provision of a tip fortorcheshaving means therein for thoroughly mixing the gaseous fuel withoxygen to'obtain proper combustion at the-outlet and to deliver freeoxygen into the flame to produce a heatsufhcient tocarbonize scaled orcorroded metal surfaces to convert the scale or corrosion into a loosepowder easily brushed off the surfaces of the metal or for brazing andother metal working operations. The foregoing and other objectsareobtained by the torch shown in the accompanying drawings anddescribed below. It is to be understood that the invention is not11mitedito the specific form thereof shown and described. r

Of the accompanying drawings, Figure 1 is a longitudinal section througha torch embodying the invention;

Figure Qis a bottom plan thereof; Figure 3 is a detailsection of thenozzle; and

Figure 4 is atop plan of the tip.

Referring to thedrawings, the numeral designates a suitable handlesupporting at one end a valve housing 11 formed with ducts 12 and 13respectively for oxygen and gaseous fuel, valves 12 and 13 beingarranged to control the flow of oxygen and gas therethrough andconnections respectively for oxygen and gas supply lines being shown at12* and 13". Conduits 14 and 15 connected respectively to ducts l2 and13 are extended through handle 10 and have a nozzle 16 secured on theirouter ends.

Nozzle 16 is formed with amixin chamber 17 into which gas is deliveredby conduit 15 and a threaded aperture in the nozzle 16 at 18 isarrangedtoreceive a tip 19 formed with ducts 20, 20 for deliveringmixed'gas and oxygen from chamber 17.

Provision of a supply of free oxygen to the flame is effected by forminga duct 21 in nozzle 16 terminating in a cone-shaped seat supply of mixed.gas to the several circumferentially arranged ducts 20, spiral slots2:5, 25 are formed in the conical end of the tip portion 23 providingducts for delivering oxygen with a whirling motion to chamber 17. Thecentral duct 24 of .the tip is .preferably restricted as at24l to createa back pressure ou the oxygen to force it through slots 25 into chamber17. i I a In use,-a supply of "oxygen and a supply of fuel gas, eachipreferablyat the-same pressure, for example twenty pounds per squareinch, are connected to the torch. The gas and a proportion of the oxygenare thoroughly mixed in chamber 17 and evenly delivered from the torchby ducts 20. Free oxygen is supplied to the issuing gases from theduct24. The issuing gases are ignited and burn with an evencarbonizing:heating or burning flame which can be employed for cleaning metalsurfaces of scale, deposits or corrosion byconverting such deposits orformations into a light powdery, oxidized material which can easily bebrushed off the metal-and also-for brazing, cutting and other metalworking operations.

Modifications of the invention may be resorted to without departing fromthe spirit thereof or the scope of the appended claims. i

What is claimed is;

1. A torch comprising a nozzle, means for supplying a gaseous fuelthereto,.and means for supplying oxygen thereto, said nozzle having amixing chamber therein and provided with a seat portion on the inlet tosaid chamber for the oxygen, said nozzle having a threadedaperturetherein in alignment with said seat, a tip extended-through saidaperture and havinga reduced portion extending through the mixingchamberand seated on said seat and means threaded into said aperture to urgethe tip against the seat, said tip having a circumferential series oflongitudinal ducts through its, body portion adapted to deliver acombustible mixture of gases from the mixing chamber Q i w to provide aflame, said tip also having a central duct through the body portion andreduced portion adapted to deliver tree oxygen to the flame, the seatengaging end of the tip being formed with one or more spiral slotsproviding ducts i'or admitting oxygen to the mixing chamber with awhirling motion to thoroughly mix the gases in the chamber and evenlysupply the mixed gases to all oi the circumferential series oi ducts,said central duct being restricted to create a bacl; premure on theoxygen for forcing a portion thereof into the mixing chamber.

2. A torch comprising a nozzle, means for supplying a gaseous fuelthereto, and means for supplying oxygen thereto, said nozzle having amixing chamber therein and provided with a seat portion on the inlet tosaid chamber for the oxygen, said nozzle having an aperture therein inalignment with said seat, a tip extended through said aperture andhaving a reduced portion extending through the mixing chamber and seatedon said seat, said tip having a circumferential series oi" longitudinalducts through its body portion adapted to deliver :1 combustible mixtureof gases from the mixing chamber to provide a flame, said tip alsohaving a central duct through the body portion and reduced portionadapted to deliver l'ree oxygen to the flame, the seat engaging end ofthe tip being formed with one or more spiral slots providing ducts lforadmitting oxygen to the mixing chamber with a whirling motion tothoroughly mix the gases in the chamber and evenly supply the mixedgases to all of the circumferential series of ducts, said central ductbeing restricted to create a back pressure on the oxygen for forcing aportion thereof into the mixing chamber.

3. A torch comprisinga nozzle, means for SllPPlf (lllg a gaseous fuelthereto, and mcans for supplying oxygen thereto, said nozzle having amixing chamber therein and provided with a seat portion on the inlet tosaid chamber for the oxygen, said nozzle having an aperture therein inalignment with said seat, a tip extended through said aperture andhaving a reduced portion extending through the mixing chamber and seatedon said seat, said tip having a circumferential series of longitudinalducts through its body portion adapted to deliver a combustible mixtureof gases from the mixing chamber to provide a flame, said tip alsohaving a central duct through the body portion and reduced portionadapted to deliver free oxygen to the flame, the seat engaging end ofthe tip being formed with one or more spiral slots providing ducts foradmitting oxygen to the mixing chamber with a whirling motion tothoroughly mix the gases in the chamber and evenly supply the mixedgases to all of the circunr l'crcntial series of ducts.

l. A torch comprising a nozzle, means for sup 'ilying a gaseous l'uelthereto, and lllt'llli: for supplying oxygen thereto, said nozzle havinga mixing chamber therein and pro vided with a seat portion on the inletto said chamber for the oxygen, said nozzle having an aperture thereinin alignment with said seat, a tip cxlcnded through said aper' ture andhaving a port ion extending through the mixing chamber and seated onsaid seat, said tip having a circumferential series of longitudinalducts through its body portion adapted to deliver a combustible mixtureof gases from the mixing chamber to provid a llamc, said tip also havinga central duct adapted to deliver free oxygen to the llamc, the seatengaging end of the tip being formed with one or more spiral slotsproviding ducts for admitting oxygen to the mixing: chamber with awhirling motion to thoroughly mix the gases in the chamhcr and evenlysupply the mixed gases to all of the oircuml'crcntial series of ducts.

5. A torch having a tip formed with a circumferential serics ol' ductsand a central duct, means for whirling a (J()llll)ll.-.lll)ltl gaseousmixture in the torch with a motion concentric to the circum'l'crentialseries of ducts prior to passage through the ducts, and means forsupplying oxygcn lo the cen tral duct.

6. A torch having a tip formed with a circuml'crential series of ducts,said torch having a mixing chamber in advance of the tip, and means forwhirling a combustible gaseous mixture in the mixing chamber prior to pasage thcrco'l to the tip, the whirling motion being concentric to thecircluni crcntial series of ducts.

7. A torch, said torch inchuling a nozzle having a mixing chan'iber,ducts for gas and oxygen extending into the mixing chamber, a tipadaplcd to sent over the oxygcn inlet to the chamber, said tip having acircumterential series of ducts therein for directing. a comlalstiblemixture of gases from th nozzle, and a duct for dirccting i'rcc oxygenfrom the nozzle, said seated portion of the tip having spiral slots inthe sealing surface thereof for directing oxygen into the mixingchaniber.

JOHN J. SALM.

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